Respirator mask



Dec. 7 1926. 1,610,106

H. S. .OLGARD RESPIRATOR MASK Filed March so, 1925 l atented Dec. 7, 1926.

HARRY S. OLGART), OF KOI-ILER, W'ISCONSIN.

. nEs'rIRAToR MASK.

7 Application filed March 30, 1925. Serial No. 19,391.

This invention relates to devices for protecting operatives employed where the atmosphere is liable to be charged with deleterious particles of matter, injurious gases, or the like, and has for one of its objects to provide a' simply constructed device which may be attached to the head of the wearer to extend over and enclosethe mouth, nostrils and eyes, and into whichfresh pure air is inhaled-and from which the exhaled air is separately discharged.

Another 'ob'ect of the inventions isto provide a device of this character including a packing element coacting with a face engaging mask to efiectually prevent the en'- trance of air except through the intake therefor and the associated parts.

lVith these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out and in the drawingsillustrain the claim;

embodiment of the 1ntive of the preferred vention, I

Fig. 1 is a side View of the head and part of the body of a figure with the improved mask applied,- and partly in section. p

2 isa. front view of a human head with the packing portions of the improved device applied. 7 y

Fig. 3 is a front elevation, enlarged, of the air receiving and discharging portion of the improved apparatus.

Fig. 4i is a section on the line ofFig. '3, looking in the direction of the arrow.

Fig.5 is a sectionaldetailillustr ating the construction of the coupling between theshell and the outflow airv tube.

Fig. 6 is a view similar to Fig. 5,il lustrating a modification in the construction. p

The improved device is designed more particularly for protecting the lungs and eyes of the operatorof sand blast apparatus,

but may be employed wherever devices of this class' are required. v

' The improved device includes an air con-' taining bagor receiverrepresented as a whole at 10 and attachable by straps 11 to the back and waist of the wearer as shown j The bag or receiver 10 is providl in Fig. 1. ed with an intake tube 12. atthe lower end and an outlet tube 13'leading from the upper end.. I

The improved device may be employed in connection with ametal hood or shieldlt to engage over the upper part of the head ranged out of alignment.

is positioned below the opening 37 and the j opening'37 is arranged centrally of the rear wall of the casing said rear wall tion 15. Attached to'the lower edge of the shield member 14, and the visor. portion 15 is a fabric member 16 which extends downwardly and engages closely around the neck and secured in position by any suitable means, for instance by lacing indicated at 17. The forward portion of the member 16 is formed with an opening covered by a foramino'us' screen indicated at 18. The improved device may be employed without the hood if preferred. l

The improved device includes a small metalcasing or shell formed of a body portion 19 having anoutstanding flange 20 to which a cover-21 is attached in any suitable manner, for instanceby screws 22, or

the like.

the interior of the casing 19. The top of the partition 23 is formed with an opening for establishing communication 7 between the chambers 25 and 26. The opening 20 is controlled by a valve 29. which is hinged, as at 30, to oneof the end walls of the casing 19 and held normally and yieldably closed through the medium of a spring 31. "The valve 29 seats on the partition23 exteriorly ofthe chamber 26. The bottom of the part1t1on 524i is provided with an opening 32 for establishing communication between the compartments 25 and 27. and-said opening 1s controlledby a'valve 33, which is hinged, as at 3 1, to the vertical leg of the partition 24: and held'normally and yieldably closed by a light spring 35. The valve 33 seats on the partition 24 within the chamber 27.

.Therearwall of the casing 19'is provided 37 and 37 arwith spaced openings 36,

The opening 36 19 and is of materially greater diameter than the diameter of the opening 36 or 37. ranged belowthe longitudinal center of said rear wall and the opening 37 above said center. The opening 36 is positioned between the vertical median and one end of and the opening 37 is arranged between the vertical median and the The opening 36 is ar other end of said rear wall. .1 1e opening 36 communicates with the compartment 26 and the opening 37 corm'nunicates with the compartment 27.

Formed integral. with the rear wall of the casing 19 and registering with the wall of the opening is a rearwardly directed tubular member 36, which in connection with the opening 36 provides an air inlet for the chamber 26. The tube 13 leading from the bag or receiver 10 isconnected to the tubular member 36, as at 38, for the purpose of supplying air to the chamber 26.

Formed integral. with the rear wall of the casing 19 and spaced from the wall of the opening 3? is a collar 48 and connected to the collar 46 as well as projecting therefrom is a ribbed sleeve 49, formed with an interiorly arranged flange which abuts against the edge of the collar 46. Positioned against the'rear wall of the casing 19, extending across the opening 37 and maintained in position by the flange of the sleeve 49 is an air filtering element formed of a porous body, such as sponge and the like, and which is indicated at 47. 'llhe opening 37, collar 46 and sleeve 49 provide an outlet for the chamber 27. Connected to the sleeve 49 is a discharge tube for the exhaled air and which communicates wlth the chamber 27 through the opening 37, collar 46 and sleeve 49.

Fitting closely upon the head of the wearer is an air-proof mask 40, preferably constructed of rubber and has its front formed with an opening which communicates with the chamber 25. The material surrounding the opening formed in the mask 40 is extended through the opening 37 in the rear wall of the casing 19 and connected air-tight with said wall. That portion of the mask 40, wl ich is connected to the rear wall of the casing 19 is indicated at 41. By this arrangement communication is established between the chamber 25 and the interior of the mask 40 so that pure air can be inhaled by the wearer of the device. The mask 40 is provided with a pair of eye openings, only one of which is shown and which is indicated at 40.

An air-tight packing element is employed and which is interposed between the mask 40 and the face of the wearer. The packing element 'is indicated at 42 and is in the form of an annulus constructed of soft ma terial, such as cotton, wool or the like. The

- packing element 42 extends over the bridge posed between the shell 1 and its closure 21, to provide an air and dust tight joint.

Formed in the cover 21 is an opening pro viding communication with the intermediate coinpartn'ient and closed by a plug 45 of rub her or the like, to provide means for the free breathing of the wearer when the air is free from injurious particles or gases or when the wearer is not in the presence of the blastingor other apparatus.

The discharge tube may be omitted and an annular member substituted therefor, to hold the filtering element 47 in position, the member 50 having a holding screen 51 while a like screen 52 may be attached over the opening 37.

When thedevice is to be used the packing element 42 is first applied and secured in place by the strings 43, after which the air bag or receiver is secured to the body of the wearer and the casing 19 together with the mask 40 secured in position with respect to the head of the wearer. The tube 13 is then coupled to the tubular member 36 to provide for a supply of fresh air to the chamber 26 during the inhalations of the wearer. After the tube 13 has been coupled to the tubular member 36, the discharge or outlet tube 39 is secured to the sleeve 49 and which provides for the discharge of air during the exhalations of the wearer.

The air bag 10 is strapped to the body of the wearer and the shell 19 likewise strapped in position and the inlet tube 13 coupled to the member 36 of the shell 19 to provide for the inlet of air at the intake end of the shell, and the outlet tube 39 likewise coupled over'the discharge opening 38.

As the wearer inhales the inflowing air opens the valve 29 and passes thence to the nostrils and mouth and when the wearer exhales the valve 29is closed and the valve 33 opened to permit the exhaled air to pass through the outflow tube 39.

Thus the pure air only can reach the throat, nostrils and lungs of the wearer of the mask.

The improved device is simple in construction, and can be made of any required size orof any required material.

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification but it will be understood that modification within the scope of the claimed invention may be made in the construction without departing from the principle of the invention or sacrificing any of its advantages. 7

Having thus described my invention what I claim as new is: V

A device for the purpose set forth, comprising a rectangular casing having its rear wall formed centrally with an opening and further formed below and spaced from said opening with an air inlet and above and 136 spaced from said opening with an air outlet, means arranged within said casing to provide anair inlet chamber associated with said inlet, an air outlet chamber arranged above the inlet chamber and associated with said outlet and an air receiving chamber associated with said opening and arranged between and common to the other of said chambers and further extended over the inlet chamberand under the outlet chamber, said inlet and outlet chambers disposed in diagonal relation with respect to and spaced from each other, a spring controlled valvular means at the top of the inlet chamber for controlling communication between the same and the receiving chamber, a spring controlled valvular means at the bottom of the outlet chamber for establishing communication between the same and the receiving chamber, a mask connected to the rear wall of said-casing and communicating with the receiving chamber through said opening,

means connected to the rear wall of said casing and associating with said inlet for supplying air to the inlet chamber, and means connected to the rear wall of said casing and associated with said outlet for discharging air from said outlet chamber.

In testimony whereof, I aflix my signature hereto.

HARRY s. OLGARD. 

